A-share battery sector advanced, with Anfu Technology, Tongguan Copper Foil and Defu Technology hitting intraday record highs. Dexin Technology notched a second consecutive daily limit-up. Nuode Co. and Hangke Technology hit the daily up-limit. Yishitong rose over 10%. Ruitai New Materials, Zhengye Technology, Jin Yinhe, Xinzhoubang and Jiayuan Technology also gained.

MOFCOM spokesman He Yadong said at a routine press briefing on the 28th that heavy rain and flooding in southern China since the start of the flood season has prompted the ministry to step up sourcing and coordinate inventories with key supply firms in affected and surrounding areas to ensure household essentials. He said the national essential-goods market is currently operating normally and supplies are sufficient.

On May 28, the Ministry of Natural Resources and seven other departments issued the Guiding Opinions on Accelerating High-Quality Development of Marine Drugs and Functional Products, the first national-level policy document on the marine biopharmaceutical industry. The guidance directs coordinated strengthening of a full-chain innovation system covering the "resource chain + science and technology chain + industry chain + application chain", and calls for deep integration of scientific/technological innovation and industrial innovation. It sets targets to 2030 for multiple marine innovative drugs to reach the market and for industry added value to surpass 130 bln yuan.